Corbel



FIG. 1 is a bottom, rear, and right perspective view of a corbel showing our new design;

FIG. 2 is a bottom, rear, and left perspective view thereof;

FIG. 3 is a right side view thereof, the left side being a mirror image;

FIG. 4 is an overhead view thereof; and,

FIG. 5 is a rear view thereof. 

The ornamental design for a corbel, as shown and described. 